Amazon Deprecating .mobi files (Patreon)

Per Amazon:

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Mobi files won't be accepted after March 18, 2025

We recommend using Kindle Create to submit fixed-layout eBooks as Kindle Package Format (KPF) or uploading an EPUB file. Learn more about this change.
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As such, they will no longer support KindleGen, which is necessary for me to create .mobi files. I will stop providing them as of March 18.